Drawing-board



(NoModeL).

F. WEBER.

DRAWING BOARD. 'NO. 312,535. Patented Feb. 17, 1885.

l U mun 22 2A). M BY 0a OR NEY.

itlwgnphur. Wishinglnn, u. c.

UNITED STATES PATENT OFFICE.

FREDERICK W'EBER, OF PHILADELPHIA, PENNSYLVANIA.

DRAWING-BOARD.

SPECIFICATION forming part of Letters Patent No. 312,535, dated February17, 1885.

Application filed October 1, 1884. (No model.)

To all whom/it may concern.-

Be it known that I, FREDERICK WEBER,'of the city and county ofPhiladelphia, State of Pennsylvania, a subject of Prussia, (havingresided one year last past in the United States and made oath ofintention to become a citizen thereofi) have invented a new and usefulImprovement in Drawing-Boards, which improvement is fully set forth inthe following specification and accompanying drawings, in which Figure 1represents a face view of a drawing-board embodying my invention. Fig. 2represents a rear view thereof. Figs. 3 and4 represent a section of aportion thereof, enlarged, in line at m, Fig. 1, the side or top bar ofthe board being shown open in Fig. 4.

Similar letters of reference indicate corresponding parts in the severalfigures.

My invention consists of a drawing-board having bars hinged to the sidesthereof, the contiguous faces of the board and bars being provided withmeans for tightening and firmly holding the paper on the board.

It further consists of the construction of the hinges which connect theside bars with the board, whereby, should the board contract or shrink,the butts of the hinges are permitted to move, thus preventing warpingof the adjacent parts or loosening of the hinges.

Referring to the drawings, A represents a drawing-board, formed ofsuitable wood, and having on the back the battens or. braces 13, forstrengthening purposes, which, however, form no part of the presentinvention.

0 G O 0 represent bars which are hinged to the sides of the board A, andadapted to move rearward thereof, it being noticed that the bars ofopposite sides are of equal lengths, so that the bars shown on the rightand left sides may turn backward or rearward between those of the topand bottom; but the arrangement may be reversed-that is to say, the topand bottom bars may be made shorter and the right and left side barslonger, so that the former may turn or fold backward within the latter.In the side edges of the board are grooves D, and on the inner edges ofthe bars are tongues E, which are so located that when the bars areclosed they enter said grooves, said tongues and grooves being V-shapedor pointed, for purposes to be hereinafter explained. To the back of theboard are pivoted the fastening buttons or fingers F, for holding thebars 0 immovable.

When it is required to fit the drawing-paper or other material to theboard, the buttons F are turned so as to release the bars 0, and thelatter are then turned back. The paper is then placed on the board andits ends or sides bent over the edges of the board, thus cover ing thegrooves D. The bars are now restored to their normal position, wherebythe. tongues E bear against the portion of the paper over the groovesand press the same into said grooves, thus gradually and easily drawingup the paper and causing it to be stretched taut and uniform on theboard, it being noticed that the V shape of the tongues and groovescauses the paper to be tightened by a wedging action without liabilityto be cut or torn by the tongues. The bars are firmly retained in theirclosed positions by the buttons F, and thus the security of the paper onthe, board is assured. When the paper is to be removed, the buttons areproperly turned, and the bars are then swung rearward, thus relievingthe paper of the holding action of the bars and permitting the entirewithdrawal of the same from the board. It is evident that the tongues Emay be formed on the sides of the board and the grooves D in the barswithout affecting the nature of the case. The hinges G, which connectthe top and bottom bars with the board, have the knuckles of the buttsa, which are screwed .to the board, cut away, as at b, so that spacesexist between said knuckles and the knuckles of the other butts, a,which latter are screwed to said top and bottom bars.

Referring to Fig. 2, it will be seen that, should the board shrink,thebutts a are drawn by the wood laterally toward the center of theboard, this being permitted by the spaces 6, and thus the hinges donot'resist the shrinking of the board, so that warping of the latter,especially at their edges, and tearing out of the screws of the hingesare prevented.

The tongues and grooves E D may be rounded or right angular, instead ofthe pointed form shown, and the tongues may be made of strips insertedin the board or bars, or be in tegral with the board or bars, in eithercase acting as stiffeners which increase the strength of the board orbars.

An artists frame may be employed in lieu of the board A for stretchingand holding canvas, a picture, &c., the frame having bars hingedthereto, and the bars and frame being tongued and grooved, the operationbeing similar to that when the board A is employed.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A drawing-board having bars hinged to the sides thereof, so as tofold to the rearward, and of such length that when raised they form acontinuation of each other and coincide with the several sides of theboard, substantially as and for the purpose set forth.

2. A drawing-board having bars hinged to the sides and forming anextension thereof, the contiguous parts of the board and bars havingtongues and grooves, whereby, when the paper is fitted to the board, theportionof the same over the sides thereof is forced by the tongues intothe grooves, and the paper is thereby stretched, substantially as andfor the purpose set forth.

3. A drawing-board having bars connected with the sides thereof by meansof hinges, the

butts whereof having their knuckles cutaway,

FREDERICK \VEBER.

\Vitnesses:

JOHN A. WVIEDERsHEIM, A. P. GRANT.

